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CSA Sem Rev
Anatomy Layering, AO, IVC
52
Other
Undergraduate 2
12/11/2010

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Term
toward the head; above the area of interest
Definition
superior
Term
below the landmark; toward the feet
Definition
inferior
Term
toward the midline of the body
Definition
medial
Term
toward the side, away from the midline of the body
Definition
lateral
Term
toward the front
Definition
anterior
Term
toward the back
Definition
posterior
Term
nearest or closest to the point of reference; usu. toward ML
Definition
proximal
Term
furthest from the ML or origination
Definition
distal
Term
along the long axis of the body or the long axis of an organ
Definition
sagittal
Term
perpendicular to the long axis
Definition
transverse
Term
What part of the screen shows what is nearest to the transducer?
Definition
the top
Term
reflects echoes with higher intensity
Definition
hyperechoic
Term
echogenicity of a low level
Definition
hypoechoic
Term
echoes with the same intensity
Definition
isoechoic
Term
tissue without echoes; black on screen
Definition
anechoic
Term
similar echoes throughout a tissue
Definition
homogeneous
Term
a tissue with a variety of different echo characteristics throughout
Definition
heterogeneous
Term
What is the sonographic appearance of the AO?
Definition
anechoic structure with echogenic walls
Term
What is the largest artery of the body?
Definition
AO
Term
At the proximal AO the measurement is approximately...
Definition
2 cm A-P
Term
What section of AO arises from the left ventricle?
Definition
root of AO
Term
What are the four sections of the thoracic AO?
Definition
root of AO, ascending AO, aortic arch, descending AO
Term
What section of the AO gives rise to the right innominate artery, left common carotid, and left subclavian
Definition
aortic arch
Term
What does the AO become after passing throught the diaphragm?
Definition
abdominal AO
Term
What is the first branch off the abdominal AO?
Definition
celiac axis
Term
What three vessels come off the celiac axis?
Definition
left gastric aretery, common hepatic artery, splenic artery
Term
Which is the largest vessel of the celiac axis?
Definition
SPA
Term
What part of the CA supplies the pancreas and the spleen?
Definition
SPA
Term
What part of the CA supplies the liver?
Definition
Common Hepatic Artery
Term
What part of the CA supplies the lower esophagus and stomach?
Definition
left gastric artery
Term
What two vessels come off the AO anteriorly near the proximal abdominal AO?
Definition
CA and SMA
Term
Why is the right renal artery longer than the left?
Definition
because it travels farther bc the AO sits to the left of ML
Term
What is a dilation of an arterial vessel called?
Definition
aneurysm
Term
Define stenosis.
Definition
narrowing of a vessel usu. caused by plaque formation or calcification
Term
What is an outpouching of one side of the vessel?
Definition
sacculation
Term
What is it when a flap tears away from the vessel wall causing an accumulation of blood between the flap and vessel wall
Definition
dissecting
Term
What are the 3 layers of a vessel inner to outer?
Definition
tunica intima
tunica media
tunica adventitia
Term
Remember the weird coronal image of the AO
Definition
the AO is the one with the branches (renal arteries)
Term
Why is the IVC and all veins more collapsible than arteries?
Definition
their tunica media is much thinner than in arteries
Term
The confluence of what veins form the IVC?
Definition
common iliac veins
Term
What are the 4 sections of the IVC?
Definition
hepatic, pre-renal, renal, post-renal
Term
What vessels have a "bunny" or "reindeer' appearance?
Definition
hepatic veins
Term
Which is longer, the left or right renal vein?
Definition
left renal vein
Term
The veins are a ______ pressure system.
Definition
low
Term
What structures in veins control flow by preventing backflow?
Definition
valves
Term
The splenic vein, SMV and IMV do not attach directly to the IVC, why?
Definition
because they form the portal venous system
Term
What are we looking for in the IVC that could be life-threatening?
Definition
thrombus
Term
What is the avg measurement of the AO distally?
Definition
1.5 cm
Term
At what measurement is the AO considered dilated?
Definition
3 cm
Term
Why is the size of the IVC variable?
Definition
it stretches out and is collapsible
Term
Name the three hepatic veins
Definition
right, middle, left
Term
The diameter of the LRV is __________ than the RRV.
Definition
larger
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